package net.minecraft.inventory;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.item.ItemStack;

public class ContainerHopper extends Container {
	private final IInventory hopperInventory;

	public ContainerHopper(InventoryPlayer playerInventory, IInventory hopperInventoryIn, EntityPlayer player) {
		this.hopperInventory = hopperInventoryIn;
		hopperInventoryIn.openInventory(player);
		int i = 51;

		for (int j = 0; j < hopperInventoryIn.getSizeInventory(); ++j) {
			this.addSlotToContainer(new Slot(hopperInventoryIn, j, 44 + j * 18, 20));
		}

		for (int l = 0; l < 3; ++l) {
			for (int k = 0; k < 9; ++k) {
				this.addSlotToContainer(new Slot(playerInventory, k + l * 9 + 9, 8 + k * 18, l * 18 + i));
			}
		}

		for (int i1 = 0; i1 < 9; ++i1) {
			this.addSlotToContainer(new Slot(playerInventory, i1, 8 + i1 * 18, 58 + i));
		}
	}

	public boolean canInteractWith(EntityPlayer playerIn) {
		return this.hopperInventory.isUseableByPlayer(playerIn);
	}

	/**
	 * Take a stack from the specified inventory slot.
	 */
	public ItemStack transferStackInSlot(EntityPlayer playerIn, int index) {
		ItemStack itemstack = null;
		Slot slot = (Slot) this.inventorySlots.get(index);

		if (slot != null && slot.getHasStack()) {
			ItemStack itemstack1 = slot.getStack();
			itemstack = itemstack1.copy();

			if (index < this.hopperInventory.getSizeInventory()) {
				if (!this.mergeItemStack(itemstack1, this.hopperInventory.getSizeInventory(),
						this.inventorySlots.size(), true)) {
					return null;
				}
			} else if (!this.mergeItemStack(itemstack1, 0, this.hopperInventory.getSizeInventory(), false)) {
				return null;
			}

			if (itemstack1.stackSize == 0) {
				slot.putStack((ItemStack) null);
			} else {
				slot.onSlotChanged();
			}
		}

		return itemstack;
	}

	/**
	 * Called when the container is closed.
	 */
	public void onContainerClosed(EntityPlayer playerIn) {
		super.onContainerClosed(playerIn);
		this.hopperInventory.closeInventory(playerIn);
	}
}
